1 //-------------------------------------------------------------------------- 2 // Program to pull the information out of various types of EXIF digital 3 // camera files and show it in a reasonably consistent way 4 // 5 // This module parses the very complicated exif structures. 6 // 7 // Matthias Wandel 8 //-------------------------------------------------------------------------- 9 #include "jhead.h" 10 11 #include <math.h> 12 #include <ctype.h> 13 #include <utils/Log.h> 14 15 static unsigned char * DirWithThumbnailPtrs; 16 static double FocalplaneXRes; 17 static double FocalplaneUnits; 18 static int ExifImageWidth; 19 static int MotorolaOrder = 0; 20 21 // for fixing the rotation. 22 static void * OrientationPtr[2]; 23 static int OrientationNumFormat[2]; 24 int NumOrientations = 0; 25 26 27 // Define the line below to turn on poor man's debugging output 28 #undef SUPERDEBUG 29 30 #ifdef SUPERDEBUG 31 #define printf LOGE 32 #endif 33 34 //-------------------------------------------------------------------------- 35 // Table of Jpeg encoding process names 36 static const TagTable_t ProcessTable[] = { 37 { M_SOF0, "Baseline", 0, 0}, 38 { M_SOF1, "Extended sequential", 0, 0}, 39 { M_SOF2, "Progressive", 0, 0}, 40 { M_SOF3, "Lossless", 0, 0}, 41 { M_SOF5, "Differential sequential", 0, 0}, 42 { M_SOF6, "Differential progressive", 0, 0}, 43 { M_SOF7, "Differential lossless", 0, 0}, 44 { M_SOF9, "Extended sequential, arithmetic coding", 0, 0}, 45 { M_SOF10, "Progressive, arithmetic coding", 0, 0}, 46 { M_SOF11, "Lossless, arithmetic coding", 0, 0}, 47 { M_SOF13, "Differential sequential, arithmetic coding", 0, 0}, 48 { M_SOF14, "Differential progressive, arithmetic coding", 0, 0}, 49 { M_SOF15, "Differential lossless, arithmetic coding", 0, 0}, 50 }; 51 52 #define PROCESS_TABLE_SIZE (sizeof(ProcessTable) / sizeof(TagTable_t)) 53 54 // 1 - "The 0th row is at the visual top of the image, and the 0th column is the visual left-hand side." 55 // 2 - "The 0th row is at the visual top of the image, and the 0th column is the visual right-hand side." 56 // 3 - "The 0th row is at the visual bottom of the image, and the 0th column is the visual right-hand side." 57 // 4 - "The 0th row is at the visual bottom of the image, and the 0th column is the visual left-hand side." 58 59 // 5 - "The 0th row is the visual left-hand side of of the image, and the 0th column is the visual top." 60 // 6 - "The 0th row is the visual right-hand side of of the image, and the 0th column is the visual top." 61 // 7 - "The 0th row is the visual right-hand side of of the image, and the 0th column is the visual bottom." 62 // 8 - "The 0th row is the visual left-hand side of of the image, and the 0th column is the visual bottom." 63 64 // Note: The descriptions here are the same as the name of the command line 65 // option to pass to jpegtran to right the image 66 67 static const char * OrientTab[9] = { 68 "Undefined", 69 "Normal", // 1 70 "flip horizontal", // left right reversed mirror 71 "rotate 180", // 3 72 "flip vertical", // upside down mirror 73 "transpose", // Flipped about top-left <--> bottom-right axis. 74 "rotate 90", // rotate 90 cw to right it. 75 "transverse", // flipped about top-right <--> bottom-left axis 76 "rotate 270", // rotate 270 to right it. 77 }; 78 79 const int BytesPerFormat[] = {0,1,1,2,4,8,1,1,2,4,8,4,8}; 80 81 //-------------------------------------------------------------------------- 82 // Describes tag values 83 84 #define TAG_INTEROP_INDEX 0x0001 85 #define TAG_INTEROP_VERSION 0x0002 86 #define TAG_IMAGE_WIDTH 0x0100 87 #define TAG_IMAGE_LENGTH 0x0101 88 #define TAG_BITS_PER_SAMPLE 0x0102 89 #define TAG_COMPRESSION 0x0103 90 #define TAG_PHOTOMETRIC_INTERP 0x0106 91 #define TAG_FILL_ORDER 0x010A 92 #define TAG_DOCUMENT_NAME 0x010D 93 #define TAG_IMAGE_DESCRIPTION 0x010E 94 #define TAG_MAKE 0x010F 95 #define TAG_MODEL 0x0110 96 #define TAG_SRIP_OFFSET 0x0111 97 #define TAG_ORIENTATION 0x0112 98 #define TAG_SAMPLES_PER_PIXEL 0x0115 99 #define TAG_ROWS_PER_STRIP 0x0116 100 #define TAG_STRIP_BYTE_COUNTS 0x0117 101 #define TAG_X_RESOLUTION 0x011A 102 #define TAG_Y_RESOLUTION 0x011B 103 #define TAG_PLANAR_CONFIGURATION 0x011C 104 #define TAG_RESOLUTION_UNIT 0x0128 105 #define TAG_TRANSFER_FUNCTION 0x012D 106 #define TAG_SOFTWARE 0x0131 107 #define TAG_DATETIME 0x0132 108 #define TAG_ARTIST 0x013B 109 #define TAG_WHITE_POINT 0x013E 110 #define TAG_PRIMARY_CHROMATICITIES 0x013F 111 #define TAG_TRANSFER_RANGE 0x0156 112 #define TAG_JPEG_PROC 0x0200 113 #define TAG_THUMBNAIL_OFFSET 0x0201 114 #define TAG_THUMBNAIL_LENGTH 0x0202 115 #define TAG_Y_CB_CR_COEFFICIENTS 0x0211 116 #define TAG_Y_CB_CR_SUB_SAMPLING 0x0212 117 #define TAG_Y_CB_CR_POSITIONING 0x0213 118 #define TAG_REFERENCE_BLACK_WHITE 0x0214 119 #define TAG_RELATED_IMAGE_WIDTH 0x1001 120 #define TAG_RELATED_IMAGE_LENGTH 0x1002 121 #define TAG_CFA_REPEAT_PATTERN_DIM 0x828D 122 #define TAG_CFA_PATTERN1 0x828E 123 #define TAG_BATTERY_LEVEL 0x828F 124 #define TAG_COPYRIGHT 0x8298 125 #define TAG_EXPOSURETIME 0x829A 126 #define TAG_FNUMBER 0x829D 127 #define TAG_IPTC_NAA 0x83BB 128 #define TAG_EXIF_OFFSET 0x8769 129 #define TAG_INTER_COLOR_PROFILE 0x8773 130 #define TAG_EXPOSURE_PROGRAM 0x8822 131 #define TAG_SPECTRAL_SENSITIVITY 0x8824 132 #define TAG_GPSINFO 0x8825 133 #define TAG_ISO_EQUIVALENT 0x8827 134 #define TAG_OECF 0x8828 135 #define TAG_EXIF_VERSION 0x9000 136 #define TAG_DATETIME_ORIGINAL 0x9003 137 #define TAG_DATETIME_DIGITIZED 0x9004 138 #define TAG_COMPONENTS_CONFIG 0x9101 139 #define TAG_CPRS_BITS_PER_PIXEL 0x9102 140 #define TAG_SHUTTERSPEED 0x9201 141 #define TAG_APERTURE 0x9202 142 #define TAG_BRIGHTNESS_VALUE 0x9203 143 #define TAG_EXPOSURE_BIAS 0x9204 144 #define TAG_MAXAPERTURE 0x9205 145 #define TAG_SUBJECT_DISTANCE 0x9206 146 #define TAG_METERING_MODE 0x9207 147 #define TAG_LIGHT_SOURCE 0x9208 148 #define TAG_FLASH 0x9209 149 #define TAG_FOCALLENGTH 0x920A 150 #define TAG_MAKER_NOTE 0x927C 151 #define TAG_USERCOMMENT 0x9286 152 #define TAG_SUBSEC_TIME 0x9290 153 #define TAG_SUBSEC_TIME_ORIG 0x9291 154 #define TAG_SUBSEC_TIME_DIG 0x9292 155 156 #define TAG_WINXP_TITLE 0x9c9b // Windows XP - not part of exif standard. 157 #define TAG_WINXP_COMMENT 0x9c9c // Windows XP - not part of exif standard. 158 #define TAG_WINXP_AUTHOR 0x9c9d // Windows XP - not part of exif standard. 159 #define TAG_WINXP_KEYWORDS 0x9c9e // Windows XP - not part of exif standard. 160 #define TAG_WINXP_SUBJECT 0x9c9f // Windows XP - not part of exif standard. 161 162 #define TAG_FLASH_PIX_VERSION 0xA000 163 #define TAG_COLOR_SPACE 0xA001 164 #define TAG_EXIF_IMAGEWIDTH 0xA002 165 #define TAG_EXIF_IMAGELENGTH 0xA003 166 #define TAG_RELATED_AUDIO_FILE 0xA004 167 #define TAG_INTEROP_OFFSET 0xA005 168 #define TAG_FLASH_ENERGY 0xA20B 169 #define TAG_SPATIAL_FREQ_RESP 0xA20C 170 #define TAG_FOCAL_PLANE_XRES 0xA20E 171 #define TAG_FOCAL_PLANE_YRES 0xA20F 172 #define TAG_FOCAL_PLANE_UNITS 0xA210 173 #define TAG_SUBJECT_LOCATION 0xA214 174 #define TAG_EXPOSURE_INDEX 0xA215 175 #define TAG_SENSING_METHOD 0xA217 176 #define TAG_FILE_SOURCE 0xA300 177 #define TAG_SCENE_TYPE 0xA301 178 #define TAG_CFA_PATTERN 0xA302 179 #define TAG_CUSTOM_RENDERED 0xA401 180 #define TAG_EXPOSURE_MODE 0xA402 181 #define TAG_WHITEBALANCE 0xA403 182 #define TAG_DIGITALZOOMRATIO 0xA404 183 #define TAG_FOCALLENGTH_35MM 0xA405 184 #define TAG_SCENE_CAPTURE_TYPE 0xA406 185 #define TAG_GAIN_CONTROL 0xA407 186 #define TAG_CONTRAST 0xA408 187 #define TAG_SATURATION 0xA409 188 #define TAG_SHARPNESS 0xA40A 189 #define TAG_DISTANCE_RANGE 0xA40C 190 191 // TODO: replace the ", 0" values in this table with the correct format, e.g. ", FMT_USHORT" 192 static const TagTable_t TagTable[] = { 193 { TAG_INTEROP_INDEX, "InteropIndex", 0, 0}, 194 { TAG_INTEROP_VERSION, "InteropVersion", 0, 0}, 195 { TAG_IMAGE_WIDTH, "ImageWidth", FMT_USHORT, 1}, 196 { TAG_IMAGE_LENGTH, "ImageLength", FMT_USHORT, 1}, 197 { TAG_BITS_PER_SAMPLE, "BitsPerSample", FMT_USHORT, 3}, 198 { TAG_COMPRESSION, "Compression", FMT_USHORT, 1}, 199 { TAG_PHOTOMETRIC_INTERP, "PhotometricInterpretation", FMT_USHORT, 1}, 200 { TAG_FILL_ORDER, "FillOrder", 0, 0}, 201 { TAG_DOCUMENT_NAME, "DocumentName", 0, 0}, 202 { TAG_IMAGE_DESCRIPTION, "ImageDescription", 0, 0 }, 203 { TAG_MAKE, "Make", FMT_STRING, -1}, 204 { TAG_MODEL, "Model", FMT_STRING, -1}, 205 { TAG_SRIP_OFFSET, "StripOffsets", FMT_USHORT, 1}, 206 { TAG_ORIENTATION, "Orientation", FMT_USHORT, 1}, 207 { TAG_SAMPLES_PER_PIXEL, "SamplesPerPixel", FMT_USHORT, 3}, 208 { TAG_ROWS_PER_STRIP, "RowsPerStrip", FMT_USHORT, 1}, 209 { TAG_STRIP_BYTE_COUNTS, "StripByteCounts", FMT_USHORT, 1}, 210 { TAG_X_RESOLUTION, "XResolution", FMT_URATIONAL, 1}, 211 { TAG_Y_RESOLUTION, "YResolution", FMT_URATIONAL, 1}, 212 { TAG_PLANAR_CONFIGURATION, "PlanarConfiguration", FMT_USHORT, 1}, 213 { TAG_RESOLUTION_UNIT, "ResolutionUnit", FMT_USHORT, 1}, 214 { TAG_TRANSFER_FUNCTION, "TransferFunction", FMT_USHORT, 768}, 215 { TAG_SOFTWARE, "Software", FMT_STRING, -1}, 216 { TAG_DATETIME, "DateTime", FMT_STRING, 20}, 217 { TAG_ARTIST, "Artist", FMT_STRING, -1}, 218 { TAG_WHITE_POINT, "WhitePoint", FMT_SRATIONAL, 2}, 219 { TAG_PRIMARY_CHROMATICITIES, "PrimaryChromaticities", FMT_SRATIONAL, 6}, 220 { TAG_TRANSFER_RANGE, "TransferRange", 0, 0}, 221 { TAG_JPEG_PROC, "JPEGProc", 0, 0}, 222 { TAG_THUMBNAIL_OFFSET, "ThumbnailOffset", 0, 0}, 223 { TAG_THUMBNAIL_LENGTH, "ThumbnailLength", 0, 0}, 224 { TAG_Y_CB_CR_COEFFICIENTS, "YCbCrCoefficients", FMT_SRATIONAL, 3}, 225 { TAG_Y_CB_CR_SUB_SAMPLING, "YCbCrSubSampling", FMT_USHORT, 2}, 226 { TAG_Y_CB_CR_POSITIONING, "YCbCrPositioning", FMT_USHORT, 1}, 227 { TAG_REFERENCE_BLACK_WHITE, "ReferenceBlackWhite", FMT_SRATIONAL, 6}, 228 { TAG_RELATED_IMAGE_WIDTH, "RelatedImageWidth", 0, 0}, 229 { TAG_RELATED_IMAGE_LENGTH, "RelatedImageLength", 0, 0}, 230 { TAG_CFA_REPEAT_PATTERN_DIM, "CFARepeatPatternDim", 0, 0}, 231 { TAG_CFA_PATTERN1, "CFAPattern", 0, 0}, 232 { TAG_BATTERY_LEVEL, "BatteryLevel", 0, 0}, 233 { TAG_COPYRIGHT, "Copyright", FMT_STRING, -1}, 234 { TAG_EXPOSURETIME, "ExposureTime", FMT_SRATIONAL, 1}, 235 { TAG_FNUMBER, "FNumber", FMT_SRATIONAL, 1}, 236 { TAG_IPTC_NAA, "IPTC/NAA", 0, 0}, 237 { TAG_EXIF_OFFSET, "ExifOffset", 0, 0}, 238 { TAG_INTER_COLOR_PROFILE, "InterColorProfile", 0, 0}, 239 { TAG_EXPOSURE_PROGRAM, "ExposureProgram", FMT_SSHORT, 1}, 240 { TAG_SPECTRAL_SENSITIVITY, "SpectralSensitivity", FMT_STRING, -1}, 241 { TAG_GPSINFO, "GPS Dir offset", 0, 0}, 242 { TAG_ISO_EQUIVALENT, "ISOSpeedRatings", FMT_SSHORT, -1}, 243 { TAG_OECF, "OECF", 0, 0}, 244 { TAG_EXIF_VERSION, "ExifVersion", FMT_BYTE, 4}, 245 { TAG_DATETIME_ORIGINAL, "DateTimeOriginal", FMT_STRING, 20}, 246 { TAG_DATETIME_DIGITIZED, "DateTimeDigitized", FMT_STRING, 20}, 247 { TAG_COMPONENTS_CONFIG, "ComponentsConfiguration", FMT_BYTE, 4}, 248 { TAG_CPRS_BITS_PER_PIXEL, "CompressedBitsPerPixel", FMT_SRATIONAL, 1}, 249 { TAG_SHUTTERSPEED, "ShutterSpeedValue", FMT_SRATIONAL, 1}, 250 { TAG_APERTURE, "ApertureValue", FMT_URATIONAL, 1}, 251 { TAG_BRIGHTNESS_VALUE, "BrightnessValue", FMT_SRATIONAL, 1}, 252 { TAG_EXPOSURE_BIAS, "ExposureBiasValue", FMT_SRATIONAL, 1}, 253 { TAG_MAXAPERTURE, "MaxApertureValue", FMT_URATIONAL, 1}, 254 { TAG_SUBJECT_DISTANCE, "SubjectDistance", FMT_URATIONAL, 1}, 255 { TAG_METERING_MODE, "MeteringMode", FMT_USHORT, 1}, 256 { TAG_LIGHT_SOURCE, "LightSource", FMT_USHORT, 1}, 257 { TAG_FLASH, "Flash", FMT_USHORT, 1}, 258 { TAG_FOCALLENGTH, "FocalLength", FMT_URATIONAL, 1}, 259 { TAG_MAKER_NOTE, "MakerNote", FMT_STRING, -1}, 260 { TAG_USERCOMMENT, "UserComment", FMT_STRING, -1}, 261 { TAG_SUBSEC_TIME, "SubSecTime", FMT_STRING, -1}, 262 { TAG_SUBSEC_TIME_ORIG, "SubSecTimeOriginal", FMT_STRING, -1}, 263 { TAG_SUBSEC_TIME_DIG, "SubSecTimeDigitized", FMT_STRING, -1}, 264 { TAG_WINXP_TITLE, "Windows-XP Title", 0, 0}, 265 { TAG_WINXP_COMMENT, "Windows-XP comment", 0, 0}, 266 { TAG_WINXP_AUTHOR, "Windows-XP author", 0, 0}, 267 { TAG_WINXP_KEYWORDS, "Windows-XP keywords", 0, 0}, 268 { TAG_WINXP_SUBJECT, "Windows-XP subject", 0, 0}, 269 { TAG_FLASH_PIX_VERSION, "FlashPixVersion", FMT_BYTE, 4}, 270 { TAG_COLOR_SPACE, "ColorSpace", FMT_USHORT, 1}, 271 { TAG_EXIF_IMAGEWIDTH, "ExifImageWidth", 0, 0}, 272 { TAG_EXIF_IMAGELENGTH, "ExifImageLength", 0, 0}, 273 { TAG_RELATED_AUDIO_FILE, "RelatedAudioFile", 0, 0}, 274 { TAG_INTEROP_OFFSET, "InteroperabilityOffset", 0, 0}, 275 { TAG_FLASH_ENERGY, "FlashEnergy", FMT_URATIONAL, 1}, 276 { TAG_SPATIAL_FREQ_RESP, "SpatialFrequencyResponse", FMT_STRING, -1}, 277 { TAG_FOCAL_PLANE_XRES, "FocalPlaneXResolution", FMT_URATIONAL, 1}, 278 { TAG_FOCAL_PLANE_YRES, "FocalPlaneYResolution", FMT_URATIONAL, 1}, 279 { TAG_FOCAL_PLANE_UNITS, "FocalPlaneResolutionUnit", FMT_USHORT, 1}, 280 { TAG_SUBJECT_LOCATION, "SubjectLocation", FMT_USHORT, 2}, 281 { TAG_EXPOSURE_INDEX, "ExposureIndex", FMT_URATIONAL, 1}, 282 { TAG_SENSING_METHOD, "SensingMethod", FMT_USHORT, 1}, 283 { TAG_FILE_SOURCE, "FileSource", 0, 1}, 284 { TAG_SCENE_TYPE, "SceneType", 0, 1}, 285 { TAG_CFA_PATTERN, "CFA Pattern", 0, -1}, 286 { TAG_CUSTOM_RENDERED, "CustomRendered", FMT_USHORT, 1}, 287 { TAG_EXPOSURE_MODE, "ExposureMode", FMT_USHORT, 1}, 288 { TAG_WHITEBALANCE, "WhiteBalance", FMT_USHORT, 1}, 289 { TAG_DIGITALZOOMRATIO, "DigitalZoomRatio", FMT_URATIONAL, 1}, 290 { TAG_FOCALLENGTH_35MM, "FocalLengthIn35mmFilm", FMT_USHORT, 1}, 291 { TAG_SCENE_CAPTURE_TYPE, "SceneCaptureType", FMT_USHORT, 1}, 292 { TAG_GAIN_CONTROL, "GainControl", FMT_URATIONAL, 1}, 293 { TAG_CONTRAST, "Contrast", FMT_USHORT, 1}, 294 { TAG_SATURATION, "Saturation", FMT_USHORT, 1}, 295 { TAG_SHARPNESS, "Sharpness", FMT_USHORT, 1}, 296 { TAG_DISTANCE_RANGE, "SubjectDistanceRange", FMT_USHORT, 1}, 297 } ; 298 299 #define TAG_TABLE_SIZE (sizeof(TagTable) / sizeof(TagTable_t)) 300 301 int TagNameToValue(const char* tagName) 302 { 303 unsigned int i; 304 for (i = 0; i < TAG_TABLE_SIZE; i++) { 305 if (strcmp(TagTable[i].Desc, tagName) == 0) { 306 printf("found tag %s val %d", TagTable[i].Desc, TagTable[i].Tag); 307 return TagTable[i].Tag; 308 } 309 } 310 printf("tag %s NOT FOUND", tagName); 311 return -1; 312 } 313 314 //-------------------------------------------------------------------------- 315 // Convert a 16 bit unsigned value to file's native byte order 316 //-------------------------------------------------------------------------- 317 static void Put16u(void * Short, unsigned short PutValue) 318 { 319 if (MotorolaOrder){ 320 ((uchar *)Short)[0] = (uchar)(PutValue>>8); 321 ((uchar *)Short)[1] = (uchar)PutValue; 322 }else{ 323 ((uchar *)Short)[0] = (uchar)PutValue; 324 ((uchar *)Short)[1] = (uchar)(PutValue>>8); 325 } 326 } 327 328 //-------------------------------------------------------------------------- 329 // Convert a 16 bit unsigned value from file's native byte order 330 //-------------------------------------------------------------------------- 331 int Get16u(void * Short) 332 { 333 if (MotorolaOrder){ 334 return (((uchar *)Short)[0] << 8) | ((uchar *)Short)[1]; 335 }else{ 336 return (((uchar *)Short)[1] << 8) | ((uchar *)Short)[0]; 337 } 338 } 339 340 //-------------------------------------------------------------------------- 341 // Convert a 32 bit signed value from file's native byte order 342 //-------------------------------------------------------------------------- 343 int Get32s(void * Long) 344 { 345 if (MotorolaOrder){ 346 return ((( char *)Long)[0] << 24) | (((uchar *)Long)[1] << 16) 347 | (((uchar *)Long)[2] << 8 ) | (((uchar *)Long)[3] << 0 ); 348 }else{ 349 return ((( char *)Long)[3] << 24) | (((uchar *)Long)[2] << 16) 350 | (((uchar *)Long)[1] << 8 ) | (((uchar *)Long)[0] << 0 ); 351 } 352 } 353 354 //-------------------------------------------------------------------------- 355 // Convert a 32 bit unsigned value to file's native byte order 356 //-------------------------------------------------------------------------- 357 void Put32u(void * Value, unsigned PutValue) 358 { 359 if (MotorolaOrder){ 360 ((uchar *)Value)[0] = (uchar)(PutValue>>24); 361 ((uchar *)Value)[1] = (uchar)(PutValue>>16); 362 ((uchar *)Value)[2] = (uchar)(PutValue>>8); 363 ((uchar *)Value)[3] = (uchar)PutValue; 364 }else{ 365 ((uchar *)Value)[0] = (uchar)PutValue; 366 ((uchar *)Value)[1] = (uchar)(PutValue>>8); 367 ((uchar *)Value)[2] = (uchar)(PutValue>>16); 368 ((uchar *)Value)[3] = (uchar)(PutValue>>24); 369 } 370 } 371 372 //-------------------------------------------------------------------------- 373 // Convert a 32 bit unsigned value from file's native byte order 374 //-------------------------------------------------------------------------- 375 unsigned Get32u(void * Long) 376 { 377 return (unsigned)Get32s(Long) & 0xffffffff; 378 } 379 380 //-------------------------------------------------------------------------- 381 // Display a number as one of its many formats 382 //-------------------------------------------------------------------------- 383 void PrintFormatNumber(void * ValuePtr, int Format, int ByteCount) 384 { 385 int s,n; 386 387 for(n=0;n<16;n++){ 388 switch(Format){ 389 case FMT_SBYTE: 390 case FMT_BYTE: printf("%02x",*(uchar *)ValuePtr); s=1; break; 391 case FMT_USHORT: printf("%d",Get16u(ValuePtr)); s=2; break; 392 case FMT_ULONG: 393 case FMT_SLONG: printf("%d",Get32s(ValuePtr)); s=4; break; 394 case FMT_SSHORT: printf("%hd",(signed short)Get16u(ValuePtr)); s=2; break; 395 case FMT_URATIONAL: 396 case FMT_SRATIONAL: 397 printf("%d/%d",Get32s(ValuePtr), Get32s(4+(char *)ValuePtr)); 398 s = 8; 399 break; 400 401 case FMT_SINGLE: printf("%f",(double)*(float *)ValuePtr); s=8; break; 402 case FMT_DOUBLE: printf("%f",*(double *)ValuePtr); s=8; break; 403 default: 404 printf("Unknown format %d:", Format); 405 return; 406 } 407 ByteCount -= s; 408 if (ByteCount <= 0) break; 409 printf(", "); 410 ValuePtr = (void *)((char *)ValuePtr + s); 411 412 } 413 if (n >= 16) printf("..."); 414 } 415 416 417 //-------------------------------------------------------------------------- 418 // Evaluate number, be it int, rational, or float from directory. 419 //-------------------------------------------------------------------------- 420 double ConvertAnyFormat(void * ValuePtr, int Format) 421 { 422 double Value; 423 Value = 0; 424 425 switch(Format){ 426 case FMT_SBYTE: Value = *(signed char *)ValuePtr; break; 427 case FMT_BYTE: Value = *(uchar *)ValuePtr; break; 428 429 case FMT_USHORT: Value = Get16u(ValuePtr); break; 430 case FMT_ULONG: Value = Get32u(ValuePtr); break; 431 432 case FMT_URATIONAL: 433 case FMT_SRATIONAL: 434 { 435 int Num,Den; 436 Num = Get32s(ValuePtr); 437 Den = Get32s(4+(char *)ValuePtr); 438 if (Den == 0){ 439 Value = 0; 440 }else{ 441 Value = (double)Num/Den; 442 } 443 break; 444 } 445 446 case FMT_SSHORT: Value = (signed short)Get16u(ValuePtr); break; 447 case FMT_SLONG: Value = Get32s(ValuePtr); break; 448 449 // Not sure if this is correct (never seen float used in Exif format) 450 case FMT_SINGLE: Value = (double)*(float *)ValuePtr; break; 451 case FMT_DOUBLE: Value = *(double *)ValuePtr; break; 452 453 default: 454 ErrNonfatal("Illegal format code %d",Format,0); 455 } 456 return Value; 457 } 458 459 //-------------------------------------------------------------------------- 460 // Process one of the nested EXIF directories. 461 //-------------------------------------------------------------------------- 462 static void ProcessExifDir(unsigned char * DirStart, unsigned char * OffsetBase, 463 unsigned ExifLength, int NestingLevel) 464 { 465 int de; 466 int a; 467 int NumDirEntries; 468 unsigned ThumbnailOffset = 0; 469 unsigned ThumbnailSize = 0; 470 char IndentString[25]; 471 472 printf("ProcessExifDir"); 473 if (NestingLevel > 4){ 474 ErrNonfatal("Maximum directory nesting exceeded (corrupt exif header)", 0,0); 475 return; 476 } 477 478 memset(IndentString, ' ', 25); 479 IndentString[NestingLevel * 4] = '\0'; 480 481 482 NumDirEntries = Get16u(DirStart); 483 #define DIR_ENTRY_ADDR(Start, Entry) (Start+2+12*(Entry)) 484 485 { 486 unsigned char * DirEnd; 487 DirEnd = DIR_ENTRY_ADDR(DirStart, NumDirEntries); 488 if (DirEnd+4 > (OffsetBase+ExifLength)){ 489 if (DirEnd+2 == OffsetBase+ExifLength || DirEnd == OffsetBase+ExifLength){ 490 // Version 1.3 of jhead would truncate a bit too much. 491 // This also caught later on as well. 492 }else{ 493 ErrNonfatal("Illegally sized exif subdirectory (%d entries)",NumDirEntries,0); 494 return; 495 } 496 } 497 if (DumpExifMap){ 498 printf("Map: %05d-%05d: Directory\n",(int)(DirStart-OffsetBase), (int)(DirEnd+4-OffsetBase)); 499 } 500 501 502 } 503 504 if (ShowTags){ 505 printf("(dir has %d entries)\n",NumDirEntries); 506 } 507 508 for (de=0;de<NumDirEntries;de++){ 509 int Tag, Format, Components; 510 unsigned char * ValuePtr; 511 int ByteCount; 512 unsigned char * DirEntry; 513 DirEntry = DIR_ENTRY_ADDR(DirStart, de); 514 515 Tag = Get16u(DirEntry); 516 Format = Get16u(DirEntry+2); 517 Components = Get32u(DirEntry+4); 518 519 if ((Format-1) >= NUM_FORMATS) { 520 // (-1) catches illegal zero case as unsigned underflows to positive large. 521 ErrNonfatal("Illegal number format %d for tag %04x", Format, Tag); 522 continue; 523 } 524 525 if ((unsigned)Components > 0x10000){ 526 ErrNonfatal("Illegal number of components %d for tag %04x", Components, Tag); 527 continue; 528 } 529 530 ByteCount = Components * BytesPerFormat[Format]; 531 532 if (ByteCount > 4){ 533 unsigned OffsetVal; 534 OffsetVal = Get32u(DirEntry+8); 535 // If its bigger than 4 bytes, the dir entry contains an offset. 536 if (OffsetVal+ByteCount > ExifLength){ 537 // Bogus pointer offset and / or bytecount value 538 ErrNonfatal("Illegal value pointer for tag %04x", Tag,0); 539 continue; 540 } 541 ValuePtr = OffsetBase+OffsetVal; 542 543 if (OffsetVal > ImageInfo.LargestExifOffset){ 544 ImageInfo.LargestExifOffset = OffsetVal; 545 } 546 547 if (DumpExifMap){ 548 printf("Map: %05d-%05d: Data for tag %04x\n",OffsetVal, OffsetVal+ByteCount, Tag); 549 } 550 }else{ 551 // 4 bytes or less and value is in the dir entry itself 552 ValuePtr = DirEntry+8; 553 } 554 555 if (Tag == TAG_MAKER_NOTE){ 556 if (ShowTags){ 557 printf("%s Maker note: ",IndentString); 558 } 559 ProcessMakerNote(ValuePtr, ByteCount, OffsetBase, ExifLength); 560 continue; 561 } 562 563 if (ShowTags){ 564 // Show tag name 565 for (a=0;;a++){ 566 if (a >= (int)TAG_TABLE_SIZE){ 567 printf("%s", IndentString); 568 printf(" Unknown Tag %04x Value = ", Tag); 569 break; 570 } 571 if (TagTable[a].Tag == Tag){ 572 printf("%s", IndentString); 573 printf(" %s = ",TagTable[a].Desc); 574 break; 575 } 576 } 577 578 // Show tag value. 579 switch(Format){ 580 case FMT_BYTE: 581 if(ByteCount>1){ 582 printf("%.*ls\n", ByteCount/2, (wchar_t *)ValuePtr); 583 }else{ 584 PrintFormatNumber(ValuePtr, Format, ByteCount); 585 printf("\n"); 586 } 587 break; 588 589 case FMT_UNDEFINED: 590 // Undefined is typically an ascii string. 591 592 case FMT_STRING: 593 // String arrays printed without function call (different from int arrays) 594 { 595 printf("\"%s\"", ValuePtr); 596 // int NoPrint = 0; 597 // printf("\""); 598 // for (a=0;a<ByteCount;a++){ 599 // if (ValuePtr[a] >= 32){ 600 // putchar(ValuePtr[a]); 601 // NoPrint = 0; 602 // }else{ 603 // // Avoiding indicating too many unprintable characters of proprietary 604 // // bits of binary information this program may not know how to parse. 605 // if (!NoPrint && a != ByteCount-1){ 606 // putchar('?'); 607 // NoPrint = 1; 608 // } 609 // } 610 // } 611 // printf("\"\n"); 612 } 613 break; 614 615 default: 616 // Handle arrays of numbers later (will there ever be?) 617 PrintFormatNumber(ValuePtr, Format, ByteCount); 618 printf("\n"); 619 } 620 } 621 622 // Extract useful components of tag 623 switch(Tag){ 624 625 case TAG_MAKE: 626 strncpy(ImageInfo.CameraMake, (char *)ValuePtr, ByteCount < 31 ? ByteCount : 31); 627 break; 628 629 case TAG_MODEL: 630 strncpy(ImageInfo.CameraModel, (char *)ValuePtr, ByteCount < 39 ? ByteCount : 39); 631 break; 632 633 case TAG_DATETIME_ORIGINAL: 634 // If we get a DATETIME_ORIGINAL, we use that one. 635 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19); 636 // Fallthru... 637 638 case TAG_DATETIME_DIGITIZED: 639 case TAG_DATETIME: 640 if (!isdigit(ImageInfo.DateTime[0])){ 641 // If we don't already have a DATETIME_ORIGINAL, use whatever 642 // time fields we may have. 643 strncpy(ImageInfo.DateTime, (char *)ValuePtr, 19); 644 } 645 646 if (ImageInfo.numDateTimeTags >= MAX_DATE_COPIES){ 647 ErrNonfatal("More than %d date fields! This is nuts", MAX_DATE_COPIES, 0); 648 break; 649 } 650 ImageInfo.DateTimeOffsets[ImageInfo.numDateTimeTags++] = 651 (char *)ValuePtr - (char *)OffsetBase; 652 break; 653 654 case TAG_WINXP_COMMENT: 655 if (ImageInfo.Comments[0]){ // We already have a jpeg comment. 656 // Already have a comment (probably windows comment), skip this one. 657 if (ShowTags) printf("Windows XP commend and other comment in header\n"); 658 break; // Already have a windows comment, skip this one. 659 } 660 661 if (ByteCount > 1){ 662 if (ByteCount > MAX_COMMENT_SIZE) ByteCount = MAX_COMMENT_SIZE; 663 memcpy(ImageInfo.Comments, ValuePtr, ByteCount); 664 ImageInfo.CommentWidchars = ByteCount/2; 665 } 666 break; 667 668 case TAG_USERCOMMENT: 669 if (ImageInfo.Comments[0]){ // We already have a jpeg comment. 670 // Already have a comment (probably windows comment), skip this one. 671 if (ShowTags) printf("Multiple comments in exif header\n"); 672 break; // Already have a windows comment, skip this one. 673 } 674 675 // Comment is often padded with trailing spaces. Remove these first. 676 for (a=ByteCount;;){ 677 a--; 678 if ((ValuePtr)[a] == ' '){ 679 (ValuePtr)[a] = '\0'; 680 }else{ 681 break; 682 } 683 if (a == 0) break; 684 } 685 686 // Copy the comment 687 if (memcmp(ValuePtr, "ASCII",5) == 0){ 688 for (a=5;a<10;a++){ 689 int c; 690 c = (ValuePtr)[a]; 691 if (c != '\0' && c != ' '){ 692 strncpy(ImageInfo.Comments, (char *)ValuePtr+a, 199); 693 break; 694 } 695 } 696 }else{ 697 strncpy(ImageInfo.Comments, (char *)ValuePtr, MAX_COMMENT_SIZE-1); 698 } 699 break; 700 701 case TAG_FNUMBER: 702 // Simplest way of expressing aperture, so I trust it the most. 703 // (overwrite previously computd value if there is one) 704 ImageInfo.ApertureFNumber = (float)ConvertAnyFormat(ValuePtr, Format); 705 break; 706 707 case TAG_APERTURE: 708 case TAG_MAXAPERTURE: 709 // More relevant info always comes earlier, so only use this field if we don't 710 // have appropriate aperture information yet. 711 if (ImageInfo.ApertureFNumber == 0){ 712 ImageInfo.ApertureFNumber 713 = (float)exp(ConvertAnyFormat(ValuePtr, Format)*log(2)*0.5); 714 } 715 break; 716 717 case TAG_FOCALLENGTH: 718 // Nice digital cameras actually save the focal length as a function 719 // of how farthey are zoomed in. 720 ImageInfo.FocalLength.num = Get32u(ValuePtr); 721 ImageInfo.FocalLength.denom = Get32u(4+(char *)ValuePtr); 722 break; 723 724 case TAG_SUBJECT_DISTANCE: 725 // Inidcates the distacne the autofocus camera is focused to. 726 // Tends to be less accurate as distance increases. 727 ImageInfo.Distance = (float)ConvertAnyFormat(ValuePtr, Format); 728 break; 729 730 case TAG_EXPOSURETIME: 731 // Simplest way of expressing exposure time, so I trust it most. 732 // (overwrite previously computd value if there is one) 733 ImageInfo.ExposureTime = (float)ConvertAnyFormat(ValuePtr, Format); 734 break; 735 736 case TAG_SHUTTERSPEED: 737 // More complicated way of expressing exposure time, so only use 738 // this value if we don't already have it from somewhere else. 739 if (ImageInfo.ExposureTime == 0){ 740 ImageInfo.ExposureTime 741 = (float)(1/exp(ConvertAnyFormat(ValuePtr, Format)*log(2))); 742 } 743 break; 744 745 746 case TAG_FLASH: 747 ImageInfo.FlashUsed=(int)ConvertAnyFormat(ValuePtr, Format); 748 break; 749 750 case TAG_ORIENTATION: 751 if (NumOrientations >= 2){ 752 // Can have another orientation tag for the thumbnail, but if there's 753 // a third one, things are stringae. 754 ErrNonfatal("More than two orientation tags!",0,0); 755 break; 756 } 757 OrientationPtr[NumOrientations] = ValuePtr; 758 OrientationNumFormat[NumOrientations] = Format; 759 if (NumOrientations == 0){ 760 ImageInfo.Orientation = (int)ConvertAnyFormat(ValuePtr, Format); 761 } 762 if (ImageInfo.Orientation < 0 || ImageInfo.Orientation > 8){ 763 ErrNonfatal("Undefined rotation value %d", ImageInfo.Orientation, 0); 764 ImageInfo.Orientation = 0; 765 } 766 NumOrientations += 1; 767 break; 768 769 case TAG_EXIF_IMAGELENGTH: 770 case TAG_EXIF_IMAGEWIDTH: 771 // Use largest of height and width to deal with images that have been 772 // rotated to portrait format. 773 a = (int)ConvertAnyFormat(ValuePtr, Format); 774 if (ExifImageWidth < a) ExifImageWidth = a; 775 break; 776 777 case TAG_FOCAL_PLANE_XRES: 778 FocalplaneXRes = ConvertAnyFormat(ValuePtr, Format); 779 break; 780 781 case TAG_FOCAL_PLANE_UNITS: 782 switch((int)ConvertAnyFormat(ValuePtr, Format)){ 783 case 1: FocalplaneUnits = 25.4; break; // inch 784 case 2: 785 // According to the information I was using, 2 means meters. 786 // But looking at the Cannon powershot's files, inches is the only 787 // sensible value. 788 FocalplaneUnits = 25.4; 789 break; 790 791 case 3: FocalplaneUnits = 10; break; // centimeter 792 case 4: FocalplaneUnits = 1; break; // millimeter 793 case 5: FocalplaneUnits = .001; break; // micrometer 794 } 795 break; 796 797 case TAG_EXPOSURE_BIAS: 798 ImageInfo.ExposureBias = (float)ConvertAnyFormat(ValuePtr, Format); 799 break; 800 801 case TAG_WHITEBALANCE: 802 ImageInfo.Whitebalance = (int)ConvertAnyFormat(ValuePtr, Format); 803 break; 804 805 case TAG_LIGHT_SOURCE: 806 ImageInfo.LightSource = (int)ConvertAnyFormat(ValuePtr, Format); 807 break; 808 809 case TAG_METERING_MODE: 810 ImageInfo.MeteringMode = (int)ConvertAnyFormat(ValuePtr, Format); 811 break; 812 813 case TAG_EXPOSURE_PROGRAM: 814 ImageInfo.ExposureProgram = (int)ConvertAnyFormat(ValuePtr, Format); 815 break; 816 817 case TAG_EXPOSURE_INDEX: 818 if (ImageInfo.ISOequivalent == 0){ 819 // Exposure index and ISO equivalent are often used interchangeably, 820 // so we will do the same in jhead. 821 // http://photography.about.com/library/glossary/bldef_ei.htm 822 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format); 823 } 824 break; 825 826 case TAG_EXPOSURE_MODE: 827 ImageInfo.ExposureMode = (int)ConvertAnyFormat(ValuePtr, Format); 828 break; 829 830 case TAG_ISO_EQUIVALENT: 831 ImageInfo.ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format); 832 if ( ImageInfo.ISOequivalent < 50 ){ 833 // Fixes strange encoding on some older digicams. 834 ImageInfo.ISOequivalent *= 200; 835 } 836 break; 837 838 case TAG_DIGITALZOOMRATIO: 839 ImageInfo.DigitalZoomRatio = (float)ConvertAnyFormat(ValuePtr, Format); 840 break; 841 842 case TAG_THUMBNAIL_OFFSET: 843 ThumbnailOffset = (unsigned)ConvertAnyFormat(ValuePtr, Format); 844 DirWithThumbnailPtrs = DirStart; 845 break; 846 847 case TAG_THUMBNAIL_LENGTH: 848 ThumbnailSize = (unsigned)ConvertAnyFormat(ValuePtr, Format); 849 ImageInfo.ThumbnailSizeOffset = ValuePtr-OffsetBase; 850 break; 851 852 case TAG_EXIF_OFFSET: 853 if (ShowTags) printf("%s Exif Dir:",IndentString); 854 855 case TAG_INTEROP_OFFSET: 856 if (Tag == TAG_INTEROP_OFFSET && ShowTags) printf("%s Interop Dir:",IndentString); 857 { 858 unsigned char * SubdirStart; 859 SubdirStart = OffsetBase + Get32u(ValuePtr); 860 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){ 861 ErrNonfatal("Illegal exif or interop ofset directory link",0,0); 862 }else{ 863 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1); 864 } 865 continue; 866 } 867 break; 868 869 case TAG_GPSINFO: 870 if (ShowTags) printf("%s GPS info dir:",IndentString); 871 { 872 unsigned char * SubdirStart; 873 SubdirStart = OffsetBase + Get32u(ValuePtr); 874 if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){ 875 ErrNonfatal("Illegal GPS directory link",0,0); 876 }else{ 877 ProcessGpsInfo(SubdirStart, ByteCount, OffsetBase, ExifLength); 878 } 879 continue; 880 } 881 break; 882 883 case TAG_FOCALLENGTH_35MM: 884 // The focal length equivalent 35 mm is a 2.2 tag (defined as of April 2002) 885 // if its present, use it to compute equivalent focal length instead of 886 // computing it from sensor geometry and actual focal length. 887 ImageInfo.FocalLength35mmEquiv = (unsigned)ConvertAnyFormat(ValuePtr, Format); 888 break; 889 890 case TAG_DISTANCE_RANGE: 891 // Three possible standard values: 892 // 1 = macro, 2 = close, 3 = distant 893 ImageInfo.DistanceRange = (int)ConvertAnyFormat(ValuePtr, Format); 894 break; 895 } 896 } 897 898 899 { 900 // In addition to linking to subdirectories via exif tags, 901 // there's also a potential link to another directory at the end of each 902 // directory. this has got to be the result of a committee! 903 unsigned char * SubdirStart; 904 unsigned Offset; 905 906 if (DIR_ENTRY_ADDR(DirStart, NumDirEntries) + 4 <= OffsetBase+ExifLength){ 907 printf("DirStart %d offset from dirstart %d", (int)DirStart, 2+12*NumDirEntries); 908 Offset = Get32u(DirStart+2+12*NumDirEntries); 909 if (Offset){ 910 SubdirStart = OffsetBase + Offset; 911 if (SubdirStart > OffsetBase+ExifLength || SubdirStart < OffsetBase){ 912 printf("SubdirStart %d OffsetBase %d ExifLength %d Offset %d", 913 (int)SubdirStart, (int)OffsetBase, ExifLength, Offset); 914 if (SubdirStart > OffsetBase && SubdirStart < OffsetBase+ExifLength+20){ 915 // Jhead 1.3 or earlier would crop the whole directory! 916 // As Jhead produces this form of format incorrectness, 917 // I'll just let it pass silently 918 if (ShowTags) printf("Thumbnail removed with Jhead 1.3 or earlier\n"); 919 }else{ 920 ErrNonfatal("Illegal subdirectory link",0,0); 921 } 922 }else{ 923 if (SubdirStart <= OffsetBase+ExifLength){ 924 if (ShowTags) printf("%s Continued directory ",IndentString); 925 ProcessExifDir(SubdirStart, OffsetBase, ExifLength, NestingLevel+1); 926 } 927 } 928 if (Offset > ImageInfo.LargestExifOffset){ 929 ImageInfo.LargestExifOffset = Offset; 930 } 931 } 932 }else{ 933 // The exif header ends before the last next directory pointer. 934 } 935 } 936 937 if (ThumbnailOffset){ 938 ImageInfo.ThumbnailAtEnd = FALSE; 939 940 if (DumpExifMap){ 941 printf("Map: %05d-%05d: Thumbnail\n",ThumbnailOffset, ThumbnailOffset+ThumbnailSize); 942 } 943 944 if (ThumbnailOffset <= ExifLength){ 945 if (ThumbnailSize > ExifLength-ThumbnailOffset){ 946 // If thumbnail extends past exif header, only save the part that 947 // actually exists. Canon's EOS viewer utility will do this - the 948 // thumbnail extracts ok with this hack. 949 ThumbnailSize = ExifLength-ThumbnailOffset; 950 if (ShowTags) printf("Thumbnail incorrectly placed in header\n"); 951 952 } 953 // The thumbnail pointer appears to be valid. Store it. 954 ImageInfo.ThumbnailOffset = ThumbnailOffset; 955 ImageInfo.ThumbnailSize = ThumbnailSize; 956 957 if (ShowTags){ 958 printf("Thumbnail size: %d bytes\n",ThumbnailSize); 959 } 960 } 961 } 962 printf("returning from ProcessExifDir"); 963 } 964 965 966 //-------------------------------------------------------------------------- 967 // Process a EXIF marker 968 // Describes all the drivel that most digital cameras include... 969 //-------------------------------------------------------------------------- 970 void process_EXIF (unsigned char * ExifSection, unsigned int length) 971 { 972 int FirstOffset; 973 974 FocalplaneXRes = 0; 975 FocalplaneUnits = 0; 976 ExifImageWidth = 0; 977 NumOrientations = 0; 978 979 if (ShowTags){ 980 printf("Exif header %d bytes long\n",length); 981 } 982 983 { // Check the EXIF header component 984 static uchar ExifHeader[] = "Exif\0\0"; 985 if (memcmp(ExifSection+2, ExifHeader,6)){ 986 ErrNonfatal("Incorrect Exif header",0,0); 987 return; 988 } 989 } 990 991 if (memcmp(ExifSection+8,"II",2) == 0){ 992 if (ShowTags) printf("Exif section in Intel order\n"); 993 MotorolaOrder = 0; 994 }else{ 995 if (memcmp(ExifSection+8,"MM",2) == 0){ 996 if (ShowTags) printf("Exif section in Motorola order\n"); 997 MotorolaOrder = 1; 998 }else{ 999 ErrNonfatal("Invalid Exif alignment marker.",0,0); 1000 return; 1001 } 1002 } 1003 1004 // Check the next value for correctness. 1005 if (Get16u(ExifSection+10) != 0x2a){ 1006 ErrNonfatal("Invalid Exif start (1)",0,0); 1007 return; 1008 } 1009 1010 FirstOffset = Get32u(ExifSection+12); 1011 if (FirstOffset < 8 || FirstOffset > 16){ 1012 // Usually set to 8, but other values valid too. 1013 ErrNonfatal("Suspicious offset of first IFD value",0,0); 1014 return; 1015 } 1016 1017 DirWithThumbnailPtrs = NULL; 1018 1019 1020 // First directory starts 16 bytes in. All offset are relative to 8 bytes in. 1021 ProcessExifDir(ExifSection+8+FirstOffset, ExifSection+8, length-8, 0); 1022 1023 ImageInfo.ThumbnailAtEnd = ImageInfo.ThumbnailOffset >= ImageInfo.LargestExifOffset ? TRUE : FALSE; 1024 #ifdef SUPERDEBUG 1025 printf("Thumbnail %s end", (ImageInfo.ThumbnailAtEnd ? "at" : "NOT at")); 1026 #endif 1027 if (DumpExifMap){ 1028 unsigned a,b; 1029 printf("Map: %05d- End of exif\n",length-8); 1030 // for (a=0;a<length-8;a+= 10){ 1031 // printf("Map: %05d ",a); 1032 // for (b=0;b<10;b++) printf(" %02x",*(ExifSection+8+a+b)); 1033 // printf("\n"); 1034 // } 1035 for (a = 0; a < length - 8; ++a) { 1036 unsigned char c = *(ExifSection+8+a); 1037 unsigned pc = isprint(c) ? c : ' '; 1038 printf("Map: %4d %02x %c", a, c, pc); 1039 } 1040 } 1041 1042 1043 // Compute the CCD width, in millimeters. 1044 if (FocalplaneXRes != 0){ 1045 // Note: With some cameras, its not possible to compute this correctly because 1046 // they don't adjust the indicated focal plane resolution units when using less 1047 // than maximum resolution, so the CCDWidth value comes out too small. Nothing 1048 // that Jhad can do about it - its a camera problem. 1049 ImageInfo.CCDWidth = (float)(ExifImageWidth * FocalplaneUnits / FocalplaneXRes); 1050 1051 if (ImageInfo.FocalLength.num != 0 && ImageInfo.FocalLength.denom != 0 1052 && ImageInfo.FocalLength35mmEquiv == 0){ 1053 // Compute 35 mm equivalent focal length based on sensor geometry if we haven't 1054 // already got it explicitly from a tag. 1055 ImageInfo.FocalLength35mmEquiv = (int)( 1056 (double)ImageInfo.FocalLength.num / ImageInfo.FocalLength.denom 1057 / ImageInfo.CCDWidth * 36 + 0.5); 1058 } 1059 } 1060 } 1061 1062 static const TagTable_t* TagToTagTableEntry(unsigned short tag) 1063 { 1064 unsigned int i; 1065 for (i = 0; i < TAG_TABLE_SIZE; i++) { 1066 if (TagTable[i].Tag == tag) { 1067 printf("found tag %d", tag); 1068 int format = TagTable[i].Format; 1069 if (format == 0) { 1070 printf("tag %s format not defined ***** YOU MUST ADD THE FORMAT TO THE TagTable in exif.c!!!!", TagTable[i].Desc); 1071 return NULL; 1072 } 1073 return &TagTable[i]; 1074 } 1075 } 1076 printf("tag %d NOT FOUND", tag); 1077 return NULL; 1078 } 1079 1080 static void writeExifTagAndData(int tag, 1081 int format, 1082 long components, 1083 long value, 1084 int valueInString, 1085 char* Buffer, 1086 int* DirIndex, 1087 int* DataWriteIndex) { 1088 void* componentsPosition = NULL; // for saving component position 1089 1090 Put16u(Buffer+ (*DirIndex), tag); // Tag 1091 Put16u(Buffer+(*DirIndex) + 2, format); // Format 1092 if (format == FMT_STRING && components == -1) { 1093 components = strlen((char*)value) + 1; // account for null terminator 1094 if (components & 1) ++components; // no odd lengths 1095 } 1096 if (format == FMT_UNDEFINED && components == -1) { 1097 // check if this UNDEFINED format is actually ASCII (as it usually is) 1098 // if so, we can calculate the size 1099 if(memcmp((char*)value, ExifAsciiPrefix, sizeof(ExifAsciiPrefix)) == 0) { 1100 components = sizeof(ExifAsciiPrefix) + 1101 strlen((char*)value + sizeof(ExifAsciiPrefix)) + 1; 1102 if (components & 1) ++components; // no odd lengths 1103 } 1104 } 1105 Put32u(Buffer+(*DirIndex) + 4, components); // Components 1106 componentsPosition = Buffer+(*DirIndex) + 4; // components # can change for lists 1107 printf("# components: %ld", components); 1108 if (format == FMT_STRING) { 1109 // short strings can fit right in the long, otherwise have to 1110 // go in the data area 1111 if (components <= 4) { 1112 strcpy(Buffer+(*DirIndex) + 8, (char*)value); 1113 } else { 1114 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1115 printf("copying value %s to %d", (char*)value, (*DataWriteIndex)); 1116 strncpy(Buffer+(*DataWriteIndex), (char*)value, components); 1117 (*DataWriteIndex) += components; 1118 } 1119 } else if ((format == FMT_UNDEFINED) && 1120 (memcmp((char*)value, ExifAsciiPrefix, sizeof(ExifAsciiPrefix)) == 0)) { 1121 // short strings can fit right in the long, otherwise have to 1122 // go in the data area 1123 if (components <= 4) { 1124 memcpy(Buffer+(*DirIndex) + 8, (char*)value, components); 1125 } else { 1126 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1127 printf("copying %s to %d", (char*)value + sizeof(ExifAsciiPrefix), (*DataWriteIndex)); 1128 memcpy(Buffer+(*DataWriteIndex), (char*)value, components); 1129 (*DataWriteIndex) += components; 1130 } 1131 } else if (!valueInString) { 1132 Put32u(Buffer+(*DirIndex) + 8, value); // Value 1133 } else { 1134 Put32u(Buffer+(*DirIndex) + 8, (*DataWriteIndex)-8); // Pointer 1135 char* curElement = strtok((char*)value, ","); 1136 int i; 1137 for (i = 0; i < components && curElement != NULL; i++) { 1138 #ifdef SUPERDEBUG 1139 printf("processing component %s format %s", curElement, formatStr(format)); 1140 #endif 1141 // elements are separated by commas 1142 if (format == FMT_URATIONAL) { 1143 char* separator = strchr(curElement, '/'); 1144 if (separator) { 1145 unsigned int numerator = atoi(curElement); 1146 unsigned int denominator = atoi(separator + 1); 1147 Put32u(Buffer+(*DataWriteIndex), numerator); 1148 Put32u(Buffer+(*DataWriteIndex) + 4, denominator); 1149 (*DataWriteIndex) += 8; 1150 } 1151 } else if (format == FMT_SRATIONAL) { 1152 char* separator = strchr(curElement, '/'); 1153 if (separator) { 1154 int numerator = atoi(curElement); 1155 int denominator = atoi(separator + 1); 1156 Put32u(Buffer+(*DataWriteIndex), numerator); 1157 Put32u(Buffer+(*DataWriteIndex) + 4, denominator); 1158 (*DataWriteIndex) += 8; 1159 } 1160 } else { 1161 // TODO: doesn't handle multiple components yet -- if more than one, have to put in data write area. 1162 value = atoi(curElement); 1163 Put32u(Buffer+(*DirIndex) + 8, value); // Value 1164 } 1165 curElement = strtok(NULL, ","); 1166 } 1167 if (components == -1) Put32u(componentsPosition, i); // update component # for unknowns 1168 } 1169 (*DirIndex) += 12; 1170 } 1171 1172 #ifdef SUPERDEBUG 1173 char* formatStr(int format) { 1174 switch (format) { 1175 case FMT_BYTE: return "FMT_BYTE"; break; 1176 case FMT_STRING: return "FMT_STRING"; break; 1177 case FMT_USHORT: return "FMT_USHORT"; break; 1178 case FMT_ULONG: return "FMT_ULONG"; break; 1179 case FMT_URATIONAL: return "FMT_URATIONAL"; break; 1180 case FMT_SBYTE: return "FMT_SBYTE"; break; 1181 case FMT_UNDEFINED: return "FMT_UNDEFINED"; break; 1182 case FMT_SSHORT: return "FMT_SSHORT"; break; 1183 case FMT_SLONG: return "FMT_SLONG"; break; 1184 case FMT_SRATIONAL: return "FMT_SRATIONAL"; break; 1185 case FMT_SINGLE: return "FMT_SINGLE"; break; 1186 case FMT_DOUBLE: return "FMT_SINGLE"; break; 1187 default: return "UNKNOWN"; 1188 } 1189 } 1190 #endif 1191 1192 //-------------------------------------------------------------------------- 1193 // Create minimal exif header - just date and thumbnail pointers, 1194 // so that date and thumbnail may be filled later. 1195 //-------------------------------------------------------------------------- 1196 static void create_EXIF_internal(ExifElement_t* elements, int exifTagCount, int gpsTagCount, char* Buffer) 1197 { 1198 unsigned short NumEntries; 1199 int DataWriteIndex; 1200 int DirIndex; 1201 int DirExifLink = 0; 1202 1203 #ifdef SUPERDEBUG 1204 LOGE("create_EXIF %d exif elements, %d gps elements", exifTagCount, gpsTagCount); 1205 #endif 1206 1207 MotorolaOrder = 0; 1208 1209 memcpy(Buffer+2, "Exif\0\0II",8); 1210 Put16u(Buffer+10, 0x2a); 1211 1212 DataWriteIndex = 16; 1213 Put32u(Buffer+12, DataWriteIndex-8); // first IFD offset. Means start 16 bytes in. 1214 1215 { 1216 DirIndex = DataWriteIndex; 1217 NumEntries = 2 + exifTagCount; // the two extra are the datetime and the thumbnail 1218 if (gpsTagCount) { 1219 ++NumEntries; // allow for the GPS info tag 1220 } 1221 DataWriteIndex += 2 + NumEntries*12 + 4; 1222 1223 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1224 DirIndex += 2; 1225 1226 // Entries go here... 1227 { 1228 // Date/time entry 1229 char* dateTime = NULL; 1230 char dateBuf[20]; 1231 if (ImageInfo.numDateTimeTags){ 1232 // If we had a pre-existing exif header, use time from that. 1233 dateTime = ImageInfo.DateTime; 1234 } else { 1235 // Oterwise, use the file's timestamp. 1236 FileTimeAsString(dateBuf); 1237 dateTime = dateBuf; 1238 } 1239 writeExifTagAndData(TAG_DATETIME, 1240 FMT_STRING, 1241 20, 1242 (long)(char*)dateBuf, 1243 FALSE, 1244 Buffer, 1245 &DirIndex, 1246 &DataWriteIndex); 1247 1248 } 1249 if (exifTagCount > 0) { 1250 int i; 1251 for (i = 0; i < exifTagCount + gpsTagCount; i++) { 1252 if (elements[i].GpsTag) { 1253 continue; 1254 } 1255 const TagTable_t* entry = TagToTagTableEntry(elements[i].Tag); 1256 if (entry == NULL) { 1257 continue; 1258 } 1259 #ifdef SUPERDEBUG 1260 LOGE("create_EXIF saving tag %x value \"%s\"",elements[i].Tag, elements[i].Value); 1261 #endif 1262 writeExifTagAndData(elements[i].Tag, 1263 entry->Format, 1264 entry->DataLength, 1265 (long)elements[i].Value, 1266 TRUE, 1267 Buffer, 1268 &DirIndex, 1269 &DataWriteIndex); 1270 } 1271 1272 if (gpsTagCount) { 1273 // Link to gps dir entry 1274 writeExifTagAndData(TAG_GPSINFO, 1275 FMT_ULONG, 1276 1, 1277 DataWriteIndex-8, 1278 FALSE, 1279 Buffer, 1280 &DirIndex, 1281 &DataWriteIndex); 1282 } 1283 1284 // Link to exif dir entry 1285 int exifDirPtr = DataWriteIndex-8; 1286 if (gpsTagCount) { 1287 exifDirPtr += 2 + gpsTagCount*12 + 4; 1288 } 1289 DirExifLink = DirIndex; 1290 writeExifTagAndData(TAG_EXIF_OFFSET, 1291 FMT_ULONG, 1292 1, 1293 exifDirPtr, 1294 FALSE, 1295 Buffer, 1296 &DirIndex, 1297 &DataWriteIndex); 1298 } 1299 1300 // End of directory - contains optional link to continued directory. 1301 Put32u(Buffer+DirIndex, 0); 1302 printf("Ending Exif section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1303 } 1304 1305 1306 // GPS Section 1307 if (gpsTagCount) { 1308 DirIndex = DataWriteIndex; 1309 printf("Starting GPS section DirIndex = %d", DirIndex); 1310 NumEntries = gpsTagCount; 1311 DataWriteIndex += 2 + NumEntries*12 + 4; 1312 1313 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1314 DirIndex += 2; 1315 { 1316 int i; 1317 for (i = 0; i < exifTagCount + gpsTagCount; i++) { 1318 if (!elements[i].GpsTag) { 1319 continue; 1320 } 1321 const TagTable_t* entry = GpsTagToTagTableEntry(elements[i].Tag); 1322 if (entry == NULL) { 1323 continue; 1324 } 1325 #ifdef SUPERDEBUG 1326 LOGE("create_EXIF saving GPS tag %x value \"%s\"",elements[i].Tag, elements[i].Value); 1327 #endif 1328 writeExifTagAndData(elements[i].Tag, 1329 entry->Format, 1330 entry->DataLength, 1331 (long)elements[i].Value, 1332 TRUE, 1333 Buffer, 1334 &DirIndex, 1335 &DataWriteIndex); 1336 } 1337 } 1338 1339 // End of directory - contains optional link to continued directory. 1340 Put32u(Buffer+DirIndex, 0); 1341 printf("Ending GPS section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1342 } 1343 1344 { 1345 // Overwriting TAG_EXIF_OFFSET which links to this directory 1346 Put32u(Buffer+DirExifLink+8, DataWriteIndex-8); 1347 1348 printf("Starting Thumbnail section DirIndex = %d", DirIndex); 1349 DirIndex = DataWriteIndex; 1350 NumEntries = 2; 1351 DataWriteIndex += 2 + NumEntries*12 + 4; 1352 1353 Put16u(Buffer+DirIndex, NumEntries); // Number of entries 1354 DirIndex += 2; 1355 { 1356 // Link to exif dir entry 1357 writeExifTagAndData(TAG_THUMBNAIL_OFFSET, 1358 FMT_ULONG, 1359 1, 1360 DataWriteIndex-8, 1361 FALSE, 1362 Buffer, 1363 &DirIndex, 1364 &DataWriteIndex); 1365 } 1366 1367 { 1368 // Link to exif dir entry 1369 writeExifTagAndData(TAG_THUMBNAIL_LENGTH, 1370 FMT_ULONG, 1371 1, 1372 0, 1373 FALSE, 1374 Buffer, 1375 &DirIndex, 1376 &DataWriteIndex); 1377 } 1378 1379 // End of directory - contains optional link to continued directory. 1380 Put32u(Buffer+DirIndex, 0); 1381 printf("Ending Thumbnail section DirIndex = %d DataWriteIndex %d", DirIndex, DataWriteIndex); 1382 } 1383 1384 1385 Buffer[0] = (unsigned char)(DataWriteIndex >> 8); 1386 Buffer[1] = (unsigned char)DataWriteIndex; 1387 1388 // Remove old exif section, if there was one. 1389 RemoveSectionType(M_EXIF); 1390 1391 { 1392 // Sections need malloced buffers, so do that now, especially because 1393 // we now know how big it needs to be allocated. 1394 unsigned char * NewBuf = malloc(DataWriteIndex); 1395 if (NewBuf == NULL){ 1396 ErrFatal("Could not allocate memory"); 1397 } 1398 memcpy(NewBuf, Buffer, DataWriteIndex); 1399 1400 CreateSection(M_EXIF, NewBuf, DataWriteIndex); 1401 1402 // Re-parse new exif section, now that its in place 1403 // otherwise, we risk touching data that has already been freed. 1404 process_EXIF(NewBuf, DataWriteIndex); 1405 } 1406 } 1407 1408 void create_EXIF(ExifElement_t* elements, int exifTagCount, int gpsTagCount) 1409 { 1410 // It is hard to calculate exact necessary size for editing the exif 1411 // header dynamically, so we are using the maximum size of EXIF, 64K 1412 const int EXIF_MAX_SIZE = 1024*64; 1413 char* Buffer = malloc(EXIF_MAX_SIZE); 1414 1415 if (Buffer != NULL) { 1416 create_EXIF_internal(elements, exifTagCount, gpsTagCount, Buffer); 1417 free(Buffer); 1418 } else { 1419 ErrFatal("Could not allocate memory"); 1420 } 1421 } 1422 1423 //-------------------------------------------------------------------------- 1424 // Cler the rotation tag in the exif header to 1. 1425 //-------------------------------------------------------------------------- 1426 const char * ClearOrientation(void) 1427 { 1428 int a; 1429 if (NumOrientations == 0) return NULL; 1430 1431 for (a=0;a<NumOrientations;a++){ 1432 switch(OrientationNumFormat[a]){ 1433 case FMT_SBYTE: 1434 case FMT_BYTE: 1435 *(uchar *)(OrientationPtr[a]) = 1; 1436 break; 1437 1438 case FMT_USHORT: 1439 Put16u(OrientationPtr[a], 1); 1440 break; 1441 1442 case FMT_ULONG: 1443 case FMT_SLONG: 1444 memset(OrientationPtr, 0, 4); 1445 // Can't be bothered to write generic Put32 if I only use it once. 1446 if (MotorolaOrder){ 1447 ((uchar *)OrientationPtr[a])[3] = 1; 1448 }else{ 1449 ((uchar *)OrientationPtr[a])[0] = 1; 1450 } 1451 break; 1452 1453 default: 1454 return NULL; 1455 } 1456 } 1457 1458 return OrientTab[ImageInfo.Orientation]; 1459 } 1460 1461 1462 1463 //-------------------------------------------------------------------------- 1464 // Remove thumbnail out of the exif image. 1465 //-------------------------------------------------------------------------- 1466 int RemoveThumbnail(unsigned char * ExifSection) 1467 { 1468 if (!DirWithThumbnailPtrs || 1469 ImageInfo.ThumbnailOffset == 0 || 1470 ImageInfo.ThumbnailSize == 0){ 1471 // No thumbnail, or already deleted it. 1472 return 0; 1473 } 1474 if (ImageInfo.ThumbnailAtEnd == FALSE){ 1475 ErrNonfatal("Thumbnail is not at end of header, can't chop it off", 0, 0); 1476 return 0; 1477 } 1478 1479 { 1480 int de; 1481 int NumDirEntries; 1482 NumDirEntries = Get16u(DirWithThumbnailPtrs); 1483 1484 for (de=0;de<NumDirEntries;de++){ 1485 int Tag; 1486 unsigned char * DirEntry; 1487 DirEntry = DIR_ENTRY_ADDR(DirWithThumbnailPtrs, de); 1488 Tag = Get16u(DirEntry); 1489 if (Tag == TAG_THUMBNAIL_LENGTH){ 1490 // Set length to zero. 1491 if (Get16u(DirEntry+2) != FMT_ULONG){ 1492 // non standard format encoding. Can't do it. 1493 ErrNonfatal("Can't remove thumbnail", 0, 0); 1494 return 0; 1495 } 1496 Put32u(DirEntry+8, 0); 1497 } 1498 } 1499 } 1500 1501 // This is how far the non thumbnail data went. 1502 return ImageInfo.ThumbnailOffset+8; 1503 1504 } 1505 1506 1507 //-------------------------------------------------------------------------- 1508 // Convert exif time to Unix time structure 1509 //-------------------------------------------------------------------------- 1510 int Exif2tm(struct tm * timeptr, char * ExifTime) 1511 { 1512 int a; 1513 1514 timeptr->tm_wday = -1; 1515 1516 // Check for format: YYYY:MM:DD HH:MM:SS format. 1517 // Date and time normally separated by a space, but also seen a ':' there, so 1518 // skip the middle space with '%*c' so it can be any character. 1519 a = sscanf(ExifTime, "%d%*c%d%*c%d%*c%d:%d:%d", 1520 &timeptr->tm_year, &timeptr->tm_mon, &timeptr->tm_mday, 1521 &timeptr->tm_hour, &timeptr->tm_min, &timeptr->tm_sec); 1522 1523 1524 if (a == 6){ 1525 timeptr->tm_isdst = -1; 1526 timeptr->tm_mon -= 1; // Adjust for unix zero-based months 1527 timeptr->tm_year -= 1900; // Adjust for year starting at 1900 1528 return TRUE; // worked. 1529 } 1530 1531 return FALSE; // Wasn't in Exif date format. 1532 } 1533 1534 1535 //-------------------------------------------------------------------------- 1536 // Show the collected image info, displaying camera F-stop and shutter speed 1537 // in a consistent and legible fashion. 1538 //-------------------------------------------------------------------------- 1539 void ShowImageInfo(int ShowFileInfo) 1540 { 1541 if (ShowFileInfo){ 1542 printf("File name : %s\n",ImageInfo.FileName); 1543 printf("File size : %d bytes\n",ImageInfo.FileSize); 1544 1545 { 1546 char Temp[20]; 1547 FileTimeAsString(Temp); 1548 printf("File date : %s\n",Temp); 1549 } 1550 } 1551 1552 if (ImageInfo.CameraMake[0]){ 1553 printf("Camera make : %s\n",ImageInfo.CameraMake); 1554 printf("Camera model : %s\n",ImageInfo.CameraModel); 1555 } 1556 if (ImageInfo.DateTime[0]){ 1557 printf("Date/Time : %s\n",ImageInfo.DateTime); 1558 } 1559 printf("Resolution : %d x %d\n",ImageInfo.Width, ImageInfo.Height); 1560 1561 if (ImageInfo.Orientation > 1){ 1562 // Only print orientation if one was supplied, and if its not 1 (normal orientation) 1563 printf("Orientation : %s\n", OrientTab[ImageInfo.Orientation]); 1564 } 1565 1566 if (ImageInfo.IsColor == 0){ 1567 printf("Color/bw : Black and white\n"); 1568 } 1569 1570 if (ImageInfo.FlashUsed >= 0){ 1571 if (ImageInfo.FlashUsed & 1){ 1572 printf("Flash used : Yes"); 1573 switch (ImageInfo.FlashUsed){ 1574 case 0x5: printf(" (Strobe light not detected)"); break; 1575 case 0x7: printf(" (Strobe light detected) "); break; 1576 case 0x9: printf(" (manual)"); break; 1577 case 0xd: printf(" (manual, return light not detected)"); break; 1578 case 0xf: printf(" (manual, return light detected)"); break; 1579 case 0x19:printf(" (auto)"); break; 1580 case 0x1d:printf(" (auto, return light not detected)"); break; 1581 case 0x1f:printf(" (auto, return light detected)"); break; 1582 case 0x41:printf(" (red eye reduction mode)"); break; 1583 case 0x45:printf(" (red eye reduction mode return light not detected)"); break; 1584 case 0x47:printf(" (red eye reduction mode return light detected)"); break; 1585 case 0x49:printf(" (manual, red eye reduction mode)"); break; 1586 case 0x4d:printf(" (manual, red eye reduction mode, return light not detected)"); break; 1587 case 0x4f:printf(" (red eye reduction mode, return light detected)"); break; 1588 case 0x59:printf(" (auto, red eye reduction mode)"); break; 1589 case 0x5d:printf(" (auto, red eye reduction mode, return light not detected)"); break; 1590 case 0x5f:printf(" (auto, red eye reduction mode, return light detected)"); break; 1591 } 1592 }else{ 1593 printf("Flash used : No"); 1594 switch (ImageInfo.FlashUsed){ 1595 case 0x18:printf(" (auto)"); break; 1596 } 1597 } 1598 printf("\n"); 1599 } 1600 1601 1602 if (ImageInfo.FocalLength.num != 0 && ImageInfo.FocalLength.denom != 0) { 1603 printf("Focal length : %4.1fmm",(double)ImageInfo.FocalLength.num / ImageInfo.FocalLength.denom); 1604 if (ImageInfo.FocalLength35mmEquiv){ 1605 printf(" (35mm equivalent: %dmm)", ImageInfo.FocalLength35mmEquiv); 1606 } 1607 printf("\n"); 1608 } 1609 1610 if (ImageInfo.DigitalZoomRatio > 1){ 1611 // Digital zoom used. Shame on you! 1612 printf("Digital Zoom : %1.3fx\n", (double)ImageInfo.DigitalZoomRatio); 1613 } 1614 1615 if (ImageInfo.CCDWidth){ 1616 printf("CCD width : %4.2fmm\n",(double)ImageInfo.CCDWidth); 1617 } 1618 1619 if (ImageInfo.ExposureTime){ 1620 if (ImageInfo.ExposureTime < 0.010){ 1621 printf("Exposure time: %6.4f s ",(double)ImageInfo.ExposureTime); 1622 }else{ 1623 printf("Exposure time: %5.3f s ",(double)ImageInfo.ExposureTime); 1624 } 1625 if (ImageInfo.ExposureTime <= 0.5){ 1626 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime)); 1627 } 1628 printf("\n"); 1629 } 1630 if (ImageInfo.ApertureFNumber){ 1631 printf("Aperture : f/%3.1f\n",(double)ImageInfo.ApertureFNumber); 1632 } 1633 if (ImageInfo.Distance){ 1634 if (ImageInfo.Distance < 0){ 1635 printf("Focus dist. : Infinite\n"); 1636 }else{ 1637 printf("Focus dist. : %4.2fm\n",(double)ImageInfo.Distance); 1638 } 1639 } 1640 1641 if (ImageInfo.ISOequivalent){ 1642 printf("ISO equiv. : %2d\n",(int)ImageInfo.ISOequivalent); 1643 } 1644 1645 if (ImageInfo.ExposureBias){ 1646 // If exposure bias was specified, but set to zero, presumably its no bias at all, 1647 // so only show it if its nonzero. 1648 printf("Exposure bias: %4.2f\n",(double)ImageInfo.ExposureBias); 1649 } 1650 1651 switch(ImageInfo.Whitebalance) { 1652 case 1: 1653 printf("Whitebalance : Manual\n"); 1654 break; 1655 case 0: 1656 printf("Whitebalance : Auto\n"); 1657 break; 1658 } 1659 1660 //Quercus: 17-1-2004 Added LightSource, some cams return this, whitebalance or both 1661 switch(ImageInfo.LightSource) { 1662 case 1: 1663 printf("Light Source : Daylight\n"); 1664 break; 1665 case 2: 1666 printf("Light Source : Fluorescent\n"); 1667 break; 1668 case 3: 1669 printf("Light Source : Incandescent\n"); 1670 break; 1671 case 4: 1672 printf("Light Source : Flash\n"); 1673 break; 1674 case 9: 1675 printf("Light Source : Fine weather\n"); 1676 break; 1677 case 11: 1678 printf("Light Source : Shade\n"); 1679 break; 1680 default:; //Quercus: 17-1-2004 There are many more modes for this, check Exif2.2 specs 1681 // If it just says 'unknown' or we don't know it, then 1682 // don't bother showing it - it doesn't add any useful information. 1683 } 1684 1685 if (ImageInfo.MeteringMode){ // 05-jan-2001 vcs 1686 switch(ImageInfo.MeteringMode) { 1687 case 2: 1688 printf("Metering Mode: center weight\n"); 1689 break; 1690 case 3: 1691 printf("Metering Mode: spot\n"); 1692 break; 1693 case 5: 1694 printf("Metering Mode: matrix\n"); 1695 break; 1696 } 1697 } 1698 1699 if (ImageInfo.ExposureProgram){ // 05-jan-2001 vcs 1700 switch(ImageInfo.ExposureProgram) { 1701 case 1: 1702 printf("Exposure : Manual\n"); 1703 break; 1704 case 2: 1705 printf("Exposure : program (auto)\n"); 1706 break; 1707 case 3: 1708 printf("Exposure : aperture priority (semi-auto)\n"); 1709 break; 1710 case 4: 1711 printf("Exposure : shutter priority (semi-auto)\n"); 1712 break; 1713 case 5: 1714 printf("Exposure : Creative Program (based towards depth of field)\n"); 1715 break; 1716 case 6: 1717 printf("Exposure : Action program (based towards fast shutter speed)\n"); 1718 break; 1719 case 7: 1720 printf("Exposure : Portrait Mode\n"); 1721 break; 1722 case 8: 1723 printf("Exposure : LandscapeMode \n"); 1724 break; 1725 default: 1726 break; 1727 } 1728 } 1729 switch(ImageInfo.ExposureMode){ 1730 case 0: // Automatic (not worth cluttering up output for) 1731 break; 1732 case 1: printf("Exposure Mode: Manual\n"); 1733 break; 1734 case 2: printf("Exposure Mode: Auto bracketing\n"); 1735 break; 1736 } 1737 1738 if (ImageInfo.DistanceRange) { 1739 printf("Focus range : "); 1740 switch(ImageInfo.DistanceRange) { 1741 case 1: 1742 printf("macro"); 1743 break; 1744 case 2: 1745 printf("close"); 1746 break; 1747 case 3: 1748 printf("distant"); 1749 break; 1750 } 1751 printf("\n"); 1752 } 1753 1754 1755 1756 if (ImageInfo.Process != M_SOF0){ 1757 // don't show it if its the plain old boring 'baseline' process, but do 1758 // show it if its something else, like 'progressive' (used on web sometimes) 1759 int a; 1760 for (a=0;;a++){ 1761 if (a >= (int)PROCESS_TABLE_SIZE){ 1762 // ran off the end of the table. 1763 printf("Jpeg process : Unknown\n"); 1764 break; 1765 } 1766 if (ProcessTable[a].Tag == ImageInfo.Process){ 1767 printf("Jpeg process : %s\n",ProcessTable[a].Desc); 1768 break; 1769 } 1770 } 1771 } 1772 1773 if (ImageInfo.GpsInfoPresent){ 1774 printf("GPS Latitude : %s\n",ImageInfo.GpsLat); 1775 printf("GPS Longitude: %s\n",ImageInfo.GpsLong); 1776 if (ImageInfo.GpsAlt[0]) printf("GPS Altitude : %s\n",ImageInfo.GpsAlt); 1777 } 1778 1779 // Print the comment. Print 'Comment:' for each new line of comment. 1780 if (ImageInfo.Comments[0]){ 1781 int a,c; 1782 printf("Comment : "); 1783 if (!ImageInfo.CommentWidchars){ 1784 for (a=0;a<MAX_COMMENT_SIZE;a++){ 1785 c = ImageInfo.Comments[a]; 1786 if (c == '\0') break; 1787 if (c == '\n'){ 1788 // Do not start a new line if the string ends with a carriage return. 1789 if (ImageInfo.Comments[a+1] != '\0'){ 1790 printf("\nComment : "); 1791 }else{ 1792 printf("\n"); 1793 } 1794 }else{ 1795 putchar(c); 1796 } 1797 } 1798 printf("\n"); 1799 }else{ 1800 printf("%.*ls\n", ImageInfo.CommentWidchars, (wchar_t *)ImageInfo.Comments); 1801 } 1802 } 1803 if (ImageInfo.ThumbnailOffset){ 1804 printf("Map: %05d-%05d: Thumbnail\n",ImageInfo.ThumbnailOffset, ImageInfo.ThumbnailOffset+ImageInfo.ThumbnailSize); 1805 } else { 1806 printf("NO thumbnail"); 1807 } 1808 } 1809 1810 1811 //-------------------------------------------------------------------------- 1812 // Summarize highlights of image info on one line (suitable for grep-ing) 1813 //-------------------------------------------------------------------------- 1814 void ShowConciseImageInfo(void) 1815 { 1816 printf("\"%s\"",ImageInfo.FileName); 1817 1818 printf(" %dx%d",ImageInfo.Width, ImageInfo.Height); 1819 1820 if (ImageInfo.ExposureTime){ 1821 if (ImageInfo.ExposureTime <= 0.5){ 1822 printf(" (1/%d)",(int)(0.5 + 1/ImageInfo.ExposureTime)); 1823 }else{ 1824 printf(" (%1.1f)",ImageInfo.ExposureTime); 1825 } 1826 } 1827 1828 if (ImageInfo.ApertureFNumber){ 1829 printf(" f/%3.1f",(double)ImageInfo.ApertureFNumber); 1830 } 1831 1832 if (ImageInfo.FocalLength35mmEquiv){ 1833 printf(" f(35)=%dmm",ImageInfo.FocalLength35mmEquiv); 1834 } 1835 1836 if (ImageInfo.FlashUsed >= 0 && ImageInfo.FlashUsed & 1){ 1837 printf(" (flash)"); 1838 } 1839 1840 if (ImageInfo.IsColor == 0){ 1841 printf(" (bw)"); 1842 } 1843 1844 printf("\n"); 1845 } 1846
